Comments (5)
Let's create an itemsModifier
(note the plural) with your proposed signature for now, and I'll merge it with itemModifier
in 1.0.0.
from redux-data-structures.
I see your point. Like you said, it's possible to add hundreds of items to a map at once by dispatching many actions. That's exactly what I do. I know it is not the most efficient way, but the performance impact has been negligible in my case, and a little for-loop in the client code isn't a big deal for me. It's kept the map API simple.
Now, I could see a situation where you already have an action with several items, which is reduced by another reducer, and you'd like to reduce that same action into a map, without having to dispatch new actions. Are you in that situation?
I can't promise that I'll implement this soon, so feel free to submit a PR. It would be greatly appreciated. I'd call it addMany...
rather than addAll...
, and I would also include a changeMany...
and removeMany...
. Also, how would you get the keys of the collection items?
Thank you for using redux-data-structures!
from redux-data-structures.
Well, I'm using redux-promise-middleware for API requests. I get a list of entities on the fulfilled
action that I want to add to a map
. I still want to dispatch the fulfilled
action because of some request state reducers (isFetching
and stuff like that) and it would be nice if that would be enough to add all entities to the map
.
Also, how would you get the keys of the collection items?
I was thinking that keyGetter
would help with that, but its default is action => action.payload.id
, so that won't work. We'd need collectionKeyGetter
(item => item.id
by default) and maybe even collectionItemGetter
(item => ({ ...item })
by default).
Example:
const users = map({
addActionTypes: ['CREATE_USER_FULFILLED'],
addManyActionTypes: ['FETCH_USERS_FULFILLED'],
changeActionTypes: ['UPDATE_USER_FULFILLED'],
removeActionTypes: ['DELETE_USER_FULFILLED'],
collectionGetter: action => [...action.payload], // default
collectionItemGetter: item => ({ ...item }), // default
collectionKeyGetter: item => item.id, // default
itemGetter: action => ({ ...action.payload }), // default
itemModifier: (item, action) => ({ ...item, ...action.payload }), // default
keyGetter: action => action.payload.id, // default
});
I'll submit a PR for this when I have time.
from redux-data-structures.
@adrienjt changeMany...
isn't as easy as I first thought, because itemModifier
takes the action
as it's second argument. I'll have to add another option for modifying items from a collection.
What do you think about changing itemModifier
to receive the result of itemGetter
instead of action
? Like this: itemModifier = (item, newItem) => ({ ...item, ...newItem })
. This way I could easily implement changeMany...
without adding another option. This would be a breaking change, though...
from redux-data-structures.
I had the same issue: I solved it by using the reduce-reducers
library to create a flat-combined reducer with the map
reducer and a custom reducer for multiple add/remove/replace handling.
Code
import { map } from "redux-data-structures";
import reduceReducers from "reduce-reducers";
const reducer = reduceReducers(map({...}), replaceAllReducer, addAllReducer, removeAllReducer);
By doing this, the "all" reducers inherit the state shape from map
, obtaining the visibility they need to operate on byId
and allIds
.
It's a workaround, but it works for the time being.
from redux-data-structures.
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